Tiered stone fountain with pool question
I am considering buying a tiered stone fountain which has a pool (sometimes called a pond or basin) as the base. I am finding several that I like, however, most of them show pictures which have the fountain standing in the center surrounded by stone coping (maybe 12" tall) in a circular shape with just dirt or grass underneath.
My question is how do you install such a fountain? What keeps the water from just going into the dirt?